Open AccessEffect of palladium adsorption on the electrical transport of semiconducting carbon nanotubes
Author(s) -
Zhao Hua-Bo,
Liang Wang,
Zhaohui Zhang
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.087302
Subject(s) - carbon nanotube , materials science , adsorption , palladium , scanning electron microscope , nanotechnology , chemical vapor deposition , metal , mechanical properties of carbon nanotubes , optical properties of carbon nanotubes , nanoparticle , transmission electron microscopy , electrical conductor , band gap , chemical engineering , nanotube , composite material , catalysis , optoelectronics , chemistry , organic chemistry , metallurgy , engineering
The metal Pd is deposited on semiconducting single-walled carbon nanotubes (SWNTs) by physical vapor deposition. The image of scanning electron microscopy shows that the Pd nanoparticles (10—30 nm) are formed on the carbon nanotubes. It is found by the conductive atomic force microscopy that with the increase of Pd nanoparticles, the semiconducting carbon nanotube is changed gradually into a metallic one. Furthermore, our density functional theory calculation demonstrates that with the Pd adsorption increasing the band gap of the SWNT becomes smaller, and eventually disappears, which is in good agreement with the experimental result.